1. Liquid Crystal Research Laboratory, Department of Physics, University of Lucknow, Lucknow 226007, India
2. Integrated Basic Science, School of Physical and Decision Science, Babasaheb Bhimrao Ambedkar University, Lucknow 226025, India
3. Department of Physics, Shri Jai Narain Misra Post Graduate College, Lucknow 226001, India
4. Centre for Nanoscience and Technology, Anna University, Chennai 600025, India
5. Department of Physics, DBS PG College, Govind Nagar, Kanpur 208006, Uttar Pradesh, India